Install manually

Copy the game files manually. You can use any old installation for that, regardless on which operating system you ran it there. If you don't have the files lying around anymore. Ask another XvT player in the lobby.

Having done that, you have to run the game in compatibility mode for Windows 98 and as an administrator, which can be done by right-clicking the Files

xvstie.exe
Z_XVT__.EXE

Properties → Compatibility tab → Tick the “Run as an Administrator” check box and set the compatibility to Windows 98. Here's some official documentation from Microsoft for it.

64-bit installer

The second and more complicated option you have is to forge a 64-bit compatible msi installer version for the XvT CD.

In this case you have some extra work to do, because Windows 7 systems are incompatible to the old 16-bit installer provided by the XvT disc. So what you need is a modified version of the installer by Markus Egger. All the documentation is found there, so we don't provide any support for it here.